/*  JSOOL - JavaScript Object Oriented Library 
 *
 *  Copyright (c) 2009, Mikhail Domanoski.
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without modification,
 *  are permitted provided that the following conditions are met:
 *
 *      * Redistributions of source code must retain the above copyright notice,
 *        this list of conditions and the following disclaimer.
 *
 *      * Redistributions in binary form must reproduce the above copyright notice,
 *        this list of conditions and the following disclaimer in the documentation
 *        and/or other materials provided with the distribution.
 *
 *      * Neither the name of Mikhail Domanoski nor the names of its
 *        contributors may be used to endorse or promote products derived from this
 *        software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 *  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 *  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 *  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

jsool.namespace("js.util");

js.util.ReferenceMap = $extends(js.util.Map,{
	cons: function(){
		this.keys = new js.util.LinkedList();
		this.values = new js.util.LinkedList();
	},
	values: null,
	keys: null,
	put: function(key, value){
		var index = this.keys.indexOf(key);
		
		if(index >= 0){
			this.values.add(value, index);
		}else{
			this.keys.add(key);
			this.values.add(key);
		}
	},
	containsKey: function(key){
		return this.keys.contains(key);
	},
	containsValue: function(value){
		return this.values.contains(value);
	},
	size: function(){return this.keys.size();},
	clear: function(){
		this.keys.clear();
		this.values.clear();
	},
	get: function(key){
		var index = this.keys.indexOf(key);
		
		if(index < 0){
			return null;
		}else{
			return this.values.get(index);
		}
	}
},'js.util.ReferenceMap');